Puppet Function: num2bool

Defined in:
puppet/modules/stdlib/lib/puppet/parser/functions/num2bool.rb
Function type:
Ruby 3.x API

Overview

num2bool() ⇒ Any

This function converts a number or a string representation of a number into a true boolean. Zero or anything non-numeric becomes false. Numbers higher then 0 become true.

Returns:

  • (Any) 


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# File 'puppet/modules/stdlib/lib/puppet/parser/functions/num2bool.rb', line 6

newfunction(:num2bool, :type => :rvalue, :doc => <<-EOS
This function converts a number or a string representation of a number into a
true boolean. Zero or anything non-numeric becomes false. Numbers higher then 0
become true.
  EOS
) do |arguments|

  raise(Puppet::ParseError, "num2bool(): Wrong number of arguments " +
    "given (#{arguments.size} for 1)") if arguments.size != 1

  number = arguments[0]

  case number
  when Numeric
    # Yay, it's a number
  when String
    begin
      number = Float(number)
    rescue ArgumentError => ex
      raise(Puppet::ParseError, "num2bool(): '#{number}' does not look like a number: #{ex.message}")
    end
  else
    begin
      number = number.to_s
    rescue NoMethodError => ex
      raise(Puppet::ParseError, "num2bool(): Unable to parse argument: #{ex.message}")
    end
  end

  # Truncate Floats
  number = number.to_i

  # Return true for any positive number and false otherwise
  return number > 0
end